Latest Research Results
1Associate Prof. Huang Meigui has published an academic paper in the TOP journal of Food Hydrocolloids
In March 2021, Food Hydrocolloids (IF=7.053) published entitled "Tunable High Internal Phase Emulsions Stabilized by Cross-linking /ElectrostaticDeposition of Polysaccharides for Delivery of Hydrophobic Bioactives.
The traditional High Internal Phase Emulsions (HIPEs) are stabilized by small molecule emulsifiers such as surfactants. They are stabilized by hydrogen bonding or electrostatic action between surfactants molecules. They have many problems, such as High dosage (5% ~ 50%), large side effects, environmental pollution and High cost.While the natural macromolecules chitosan and xanthan gum have nutritional properties, non-toxic side effects, wide source, low price and high biocompatibility, which can be used in food, β -carotene as a hydrophobic nutrient, can be used as a nutritional supplement and natural food coloring.In this study, the cross-linking between polysaccharides was used to form microspheres, and the non-cross-linking polysaccharides were adsorbed to the surface of microspheres by adjusting the pH by electrostatic deposition. The results showed that HIPEs with high viscoelastic and inner phase volume fraction (85.6%) could be prepared using only 0.5%wt of polysaccharides.The internal phase volume fraction, morphology and rheological properties of HIPEs can be controlled by changing pH, polysaccharide concentration and ultrasonic power.This study provides an idea for polysaccharide - based transport of hydrophobic active substances.
The article links: https://doi.org/10.1016/j.foodhyd.2021.106742
2Shen Dongbei, a graduate student, published a research paper in Food Chemistry.
In April 2021,"Cocktail enzym-assisted alkaline extraction and Identification of Jujube peel," was published online in the journal Food Chemistry (IF=6.306).
The team optimized the ratio of compound enzymes (cellulase, pectinase and protease) by response surface methodology to obtain the best ratio of enzymes.Then, the response surface was applied to further optimize the enzymatic hydrolysis conditions of complex enzymes, and the best conditions of enzymatic hydrolysis were obtained.Under the optimal conditions, the extraction yield of total phenols was 9.02 ± 0.63 mg GAE/g, the extraction yield of total flavonoids was 11.14 ± 0.45 mg RE/g and the a* value of pigment was 8.93 ± 0.43.The pigment components of jujube peel were identified by UPLC-MS/MS.The main components of pigment were found to be P-Coumaric acid, (-)-epicatechin, Quercetin-3-o-robinobioside, Rutin, Kaempferol 3-o-robinobioside,Quercetin 3-O-alpha-L-arabinosyl-(1 - > 2)- alpha - L - rhamnoside, quercetin 3-O-beta -D- xylosy -(1 -> 2) - alpha - L - rhamnoside, quercetin.This study not only provides guidance for green production of jujube pigment, but also finds the value of reuse of jujube peel waste.
The article links: https://doi.org/10.1016/j.foodchem.2021.129747
3Master student Dong Qihui published a research paper in the journal of Industrial Crops and Products
In April 2021, a research paper named "Efficient Removal of Ginkgolic acids from Ginkgo biloba leaves" was published in Industrial Crops and Products" by Dong Qihui, a master student in Food Science and Engineering. Professor Su Erzheng is the corresponding author of the paper. Nanjing Forestry University is the first unit.
Ginkgo biloba is a unique multi-purpose tree species in China and a rare plant under national secondary protection.China is the origin of ginkgo biloba, but also the world's largest ginkgo biloba leaf resources accounted for more than 70 percent of the world's total.Ginkgo biloba leaf extract is a kind of product enriched with effective components extracted from dried ginkgo biloba leaves by organic solvent. It is widely used in medicine, health care products, food additives, cosmetics and other fields, and has certain effect on the treatment of cardiovascular and cerebrovascular diseases, Alzheimer's disease and other cognitive dysfunction.Ginkgo phenolic acid in ginkgo biloba leaves is the main cause of adverse reactions to ginkgo biloba formulations, which can cause cytotoxicity, embryonic toxicity, sensitization, inhibition of enzyme system and mild neurotoxicity.Therefore, the domestic and foreign standards stipulate that the content of ginkgo phenolic acid in ginkgo biloba leaf extract should not be higher than 5ppm.In this study, a ternary hydrophobic eutectic solvent was designed according to the structural characteristics of gko phenolic acid, and the liquid liquid microextraction technology was applied to remove gko phenolic acid efficiently. A series of design optimization was carried out, and the optimal removal conditions were finally determined.Under these conditions, the content of ginkgo phenolic acid in crude extract of ginkgo biloba leaves could be reduced to less than 5ppm.The liquid-liquid microextraction technology based on deep eutectic solvent developed in this study has the advantages of simple operation, green safety, high efficiency and energy saving, and provides a new idea for the removal of ginkgo phenolic acid.
The article links: https://doi.org/10.1016/j.indcrop.2021.113462
4Doctoral student Wang Hanbo has published a research paper in the journal of Agricultural and Food Chemistry
In November 2020, a research paper named "Nitric Oxide and Hydrogen Peroxide Are Involved in Methyl Jasmonate-Regulated Response against Botrytis cinerea in Postharvest Blueberries" was published in Journal of Agricultural and Food Chemistry (IF=4.192). Professor Wu Caie is the corresponding author of this paper, and Nanjing Forestry University is the first author.
Botrytis cinerea (Botrytis cinerea) is the main fungal disease that causes postharvest loss of blueberries.The team's previous experiments showed that methyl jasmonate, a widely present endogenous plant hormone, effectively enhanced postharvest resistance to gray mold in blueberries. In recent years, more and more studies have shown that there are many signaling molecules involved and play an important role in jasmonic acid signaling pathway.The team found that blueberries treated with methyl jasmonate and inoculated with Botrytiana cinerea showed accumulation of nitric oxide (NO) and hydrogen peroxide (H2O2) early in storage.However, whether NO and H2O2 are involved in the process of disease resistance induced by methyl jasmonate in blueberry remains unclear.Moreover, the regulatory mechanism behind it is not clear.In this paper, we investigated the role of NO and H2O2 in methyl jasmonate-induced disease resistance in blueberry by using DPI (NADPH oxidase specific inhibitor) and cPTIO (NO specific scavant).The results showed that methyl jasmonate treatment enhanced the resistance of blueberries to gray mold by activating the PR protein and phenylpropane metabolic pathway by regulating the metabolism of NO and H2O2.Moreover, in this process, the accumulation and function of H2O2 seem to be regulated by NO.This study laid a foundation for further elucidating the mechanism of methyl jasmonate inducing disease resistance in blueberry.
The article links: https://doi.org/10.1021/acs.jafc.0c04943
